Marine sounding apparatus.



H. K. MARSHALL.

MARINE sommme- APPARATUS.

APPLICATION I'.ILIBD NOV. 25, 1910.

' Patented Feb. 6, 1912.-

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in)? (a) H. K. MARSHALL.

MARINE SOUNDING APPARATUS.

APPLICATION FILED NOV. 25, 1910.

923 Patented Feb. 6, 1912.

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Vii/M31966 [/ZIZIZZZI' K. MARSHALL.

MARINE SOUNDING APIARATUS.

APPLICATION FILED NOV. 25, 1910.

Patented Feb. 6, 191".

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ALL, Q1? SYDNEY, NEW SOUTH WALES, .faUSTRALIA.

EEMIEE sounnrnc APPARATUS.

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Specification of Letters Patent. .Paten tefi Feb, 6, 1912,

Application filed N member 25, 1910. Serial No. 594,218.

matically recording the same 'upon a chart.

The essential features of the invention consist of a dependent frame pivoted to a. vessel, preferably a barge or unt con Structed for the purpose,'and carrying at its lower extremity a 'I'OHGI' designed to travel upon the bottom of the harbor or river asthe' vessel is propelled upon the surface. The frame does not hang vertically, so that the varying depth of water causes angular movement, which by the use of certain levers, shafts and pulleys, is communicated to a drum rotated thereby upon its axis in one direction or the other as. the depth increases or decreases. A recording chart is fixed upon the said drum and a pencil point in contact therewith is. caused to travel longitudinally thereon by means ofa weight, its movement being controlled by'a clock so that it travels a predetermined distance in a certain time and the chart be-.

ing marked accordingly by a series of circumferential lines, the depth (as indicated by the pencil) at any hour is recorded. In addition a pointer Working in conjunction With a graduated are or quadrant enables the depth to be taken visually, simultane-. ously acting as a check" upon the recording mechanism and as a standard from which the required position 'of a new chart upon the drum may be decided. i I

As it is advisable to retainthe surface of the barge as nearlyhorizontal as possible a balance or compensation weight is provided thereon and designed to be moved forward or aft by the aotlon of the sounding frame so as to counterbalance the varying weight of the latter upon one end of the barge as it assumes various angles. For the purpose of enabling the relative position of the barge to the horizontal to be ascertained a spirit level andinclinometer are provided.

In order to-indicatethe practical application of this invention reference will now bemade to the accompanying drawings in Figure 1 is a perspective view of a barge or punt fitted with the sounding apparatus described herein. Fig. 2 is a part sectional View of the same. Fig. 3 is a detail show-' ing the recording drum with chart, clock and balance-weight. Fig. 4: is aview of a diagrammatic chart.

The punt 5 has pivoted thereto at at. a as near to the bottom thereof as possible, the

members 6. 6. of the sounding frame (one on each side). carrying between them at their lower extremities the roller 7. To extenslons of the upper ends of the membersG. 6.

are pivoted the rods 8. 8. connecting with I levers 9. 9. mounted upon theextremities of the transverse shaft 10." Upon this shaft is mounted the pointer 11 arranged to' work against the graduated face of the arc'or quadrant12. Also upon the said shaft is v mounted the bevel wheel 13 gearing with the bevel pinion 14 mounted upon one end of the longitudinal shaft 15 upon the other end of which is the pulley 16. This pulley actuates by means of a belt or sprocket chain 17 y the pulley 18 mounted upon one end of the axle of the drum 19'supported upon a frame 20. This drum carries the chart 21, divided by longitudinal and transverse lines (the latter becoming circumferential when'wound upon the drum) the former indicating depth and the latter time and each numerated accordingly by marginal figures (see Fig. 4).

A pencil is held in the carrier 22 which is connected at one end byacord 23 .to aweight 24 and at the other end by a cord 25 to a drum 26 attached to aclock 27 so that'the mechanism of the clock'will rotate the drum and pay out the cord,the weight thereupon traversing the carrier. If con-1 sid'ered advisable the weight 24may be made ti)p1I{'0 Vlde tl1G required energy'to actuate the o oo 'A winch 28 is provided at the stern of the barge for the purpose of raising the free end of the sounding frame when desired into the position indicated by dottedlines in Fig. 2 by means of theropes 29. 29. connected thereto. Check chains 30 are provided to prevent the frame from assuming a vertical position which would be likely to cause dam v age when working in anything but perfectly smooth water.

The balance-weightfil iscidesi'gned to move upon rails and is oonne a ed by cords i 32 and 33 arranged upon suitable pulleys to one or both of the members 6. 6. at pointsabove and below the, pivot respectively, so that the movement of the free end of the sounding frame toward. or from the vertical will move the balance-weight correspond ingly backward and vice versa.

- The operative recording preferably inclosed in a housing 34 and a spirit level 35, inclinometer 36 and compass 37 are provided to assist in the efiective working of the bargefor obtaining correct soundings. l

The operation of the appliances will readily be understood. from the fore oing and it will be seen that as'the roller has a length equal to the full width of the barge the soundings taken cover a wide path in each passage and the work is consequently expedited, while the readings taken indicate the minimum depth of water at any point within that path as a pinnacle of rock -(for example) will raise the sounding frame as effectively as would a shelf or ledge extending the full width of the path.

What I claim and desire to secure by Letters Patent is 1. In a marine sounding apparatus, a

floating structure, a soundlng frame pivotally supported intermediate of its length from said floating structure and extending therebelow into the water downwardly and rearwardly and contacting the bed of the water at its lower end, a rotating recording drum carried on said floating structure; and. means operatively connected to said frame above its pivot point and adapted to rotate said recording drum exactly proportional to the changes in depth of the water as denoted by the swinging of said sounding frame.

2. In a marine sounding apparatus, a floating structure, a pair of depending arms pivoted to the forward end of said structure one on each side thereof and having extensions beyond the pii'fot point, a ground roller journaled in the lower extremities of said arms and extending horizontally therebetween, a recording apparatus, and means operatively connecting said recording apparatus with said extensions.

3. Improvements in marine sounding apparatus consisting of a ground roller pivotally mounted transversely between the mechanism is 1 lower, extremities of the members of a dependent frame pivoted to a floating structure, a rotat-ably mounted drum carrying a recording chart and operated and controlled by the said frame by means of levers and earing, all substantially as described and illustrated. I

4:. Improvements in marine sounding apparatus consisting of a ground roller pi otally mounted transversely between the lower extremities of the members of do pendent framepivoted to a floating struc ture, a rotatably mounted drum carrying a recording chart and operated and con 'trolled bythe said frame by means of levers and-gearing, and a balance weight operated and controlled by the said frame, all substantially asdescribed and illustrated.

5. In a marine sounding apparatus, a

flp'ating structure, a pair of depending arms f pivoted one at each side of said structure at the forward end thereof and having (ll i,

tensions beyond the pivot point a ground roller journaled at the lower extremities of said armsand extending therebetween, a rotatable drum mounted on said structure and carrying a recording chart on its periphery, levers and gears operatively connecting said extensions with said drum for rotating the latter coincidently with the movement of I said depending arms, a marker in contact with said chart, and means for constantly and uniformly moving said marker in an axial direction across said chart.

6. In a marine sounding apparatus, a floating structure, a frame pivoted to the forward end of and depending below said structure and carrying a ground roller at the lower end thereof, a. counterbalance weight slidable longitudinally on said float a rope operatively connecting the pivot point, and a rope operatively connecting the other end of said weight to the frame below the pivot point for the i purpose herein described.

Signed at Sydney, New South Wales, Commonwealth of Australia, this-15th day of October 1910.

, HUGH KEITH MARSHALL.

Witnesses:

CHAS. HATTON, I WM, NEWTON. 

